 /*****************************************************************************
  *
  * \file
  *
  * \brief EIC driver for AVR32 UC3.
  *
  * AVR32 External Interrupt Controller driver module.
  *
  * Copyright (c) 2009-2011 Atmel Corporation. All rights reserved.
  *
  * \asf_license_start
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright notice, this
  *    list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  *
  * 3. The name of Atmel may not be used to endorse or promote products derived
  *    from this software without specific prior written permission.
  *
  * 4. This software may only be redistributed and used in connection with an Atmel
  *    AVR product.
  *
  * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
  * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * \asf_license_stop
  *
  ******************************************************************************/


 #include <avr32/io.h>
 #include "compiler.h"
 #include "preprocessor.h"
 #include "eic.h"



 void eic_init(volatile avr32_eic_t *eic, const eic_options_t *opt, uint32_t nb_lines)
 {
     int i;
     for (i = 0; i < nb_lines; i++)
     {
         // Set up mode level
         eic->mode = (opt[i].eic_mode == 1)
             ? (eic->mode | (1 << opt[i].eic_line))
             : (eic->mode & ~(1 << opt[i].eic_line));
         // Set up edge type
         eic->edge = (opt[i].eic_edge == 1)
             ? (eic->edge | (1 << opt[i].eic_line))
             : (eic->edge & ~(1 << opt[i].eic_line));
         // Set up level
         eic->level = (opt[i].eic_level == 1)
             ? (eic->level | (1 << opt[i].eic_line))
             : (eic->level & ~(1 << opt[i].eic_line));
         // Set up if filter is used
         eic->filter = (opt[i].eic_filter == 1)
             ? (eic->filter | (1 << opt[i].eic_line))
             : (eic->filter & ~(1 << opt[i].eic_line));
         // Set up which mode is used : asynchronous mode/ synchronous mode
         eic->async = (opt[i].eic_async == 1)
             ? (eic->async | (1 << opt[i].eic_line))
             : (eic->async & ~(1 << opt[i].eic_line));
     }
 }

 void eic_enable_lines(volatile avr32_eic_t *eic, uint32_t mask_lines)
 {
     eic->en = mask_lines;
 }

 void eic_enable_line(volatile avr32_eic_t *eic, uint32_t line_number)
 {
     // Enable line line_number
     eic->en = 1 << line_number;
 }

 void eic_disable_lines(volatile avr32_eic_t *eic, uint32_t mask_lines)
 {
     eic->dis = mask_lines;
 }

 void eic_disable_line(volatile avr32_eic_t *eic, uint32_t line_number)
 {
     // Disable line line_number
     eic->dis = 1 << line_number;
 }

 bool eic_is_line_enabled(volatile avr32_eic_t *eic, uint32_t line_number)
 {
     return (eic->ctrl & (1 << line_number)) != 0;
 }

 void eic_enable_interrupt_lines(volatile avr32_eic_t *eic, uint32_t mask_lines)
 {
     eic->ier = mask_lines;
 }

 void eic_enable_interrupt_line(volatile avr32_eic_t *eic, uint32_t line_number)
 {
     // Enable line line_number
     eic->ier = 1 << line_number;
 }

 void eic_disable_interrupt_lines(volatile avr32_eic_t *eic, uint32_t mask_lines)
 {
     irqflags_t flags;
     flags = cpu_irq_save();
     eic->idr = mask_lines;
     eic->imr;
     cpu_irq_restore(flags);
 }

 void eic_disable_interrupt_line(volatile avr32_eic_t *eic, uint32_t line_number)
 {
     irqflags_t flags;
     flags = cpu_irq_save();
     eic->idr = 1 << line_number;
     eic->imr;
     cpu_irq_restore(flags);
 }

 bool eic_is_interrupt_line_enabled(volatile avr32_eic_t *eic, uint32_t line_number)
 {
     return (eic->imr & (1 << line_number)) != 0;
 }

 void eic_clear_interrupt_lines(volatile avr32_eic_t *eic, uint32_t mask_lines)
 {
     irqflags_t flags;
     flags = cpu_irq_save();
     eic->icr = mask_lines;
     eic->isr;
     cpu_irq_restore(flags);
 }

 void eic_clear_interrupt_line(volatile avr32_eic_t *eic, uint32_t line_number)
 {
     irqflags_t flags;
     flags = cpu_irq_save();
     eic->icr = 1 << line_number;
     eic->isr;
     cpu_irq_restore(flags);
 }

 bool eic_is_interrupt_line_pending(volatile avr32_eic_t *eic, uint32_t line_number)
 {
     return (eic->isr & (1 << line_number)) != 0;
 }

 #if !defined(AVR32_EIC_301_H_INCLUDED) && !defined(AVR32_EIC_302_H_INCLUDED)
 void eic_enable_interrupt_scan(volatile avr32_eic_t *eic, uint32_t presc)
 {
     // Enable SCAN function with PRESC value
     eic->scan |= (presc << AVR32_EIC_SCAN_PRESC_OFFSET) | (1 << AVR32_EIC_SCAN_EN_OFFSET);
 }

 void eic_disable_interrupt_scan(volatile avr32_eic_t *eic)
 {
     // Disable SCAN function
     eic->scan = 0 << AVR32_EIC_SCAN_EN_OFFSET;
 }

 uint32_t eic_get_interrupt_pad_scan(volatile avr32_eic_t *eic)
 {
     // Return pad number that causes interrupt
     return(eic->scan>>AVR32_EIC_SCAN_PIN_OFFSET);
 }
 #endif
